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Photo of Plantain Seed

Plantain Seed

车前子 · Chē Qián Zǐ

Eases painful urination and puffy ankles

Properties

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What it does

Plantain seed is for burning, stop-start urination and for ankles that puff up by evening. In TCM it separates usable fluid from waste and sends the waste out through your urine, which is why it covers swelling and painful peeing in the same breath. It also loosens a wet, rattly cough. The seeds swell into a gel in water, so they get decocted in a cloth bag.

Safety

  • Always take it with a full glass of liquid, at least 8oz. Taking the seeds dry is the main risk with this herb.
  • The seeds are high in mucilage and bulk up in the gut.
  • Do not use it if you have a bowel obstruction, a narrowed esophagus, or any known narrowing of the intestines.
  • A diuretic that flushes potassium with fluid. Don't exceed the normal range, especially on potassium-lowering drugs.
  • The mucilage may change how your body regulates blood sugar. With diabetes, monitor your levels while taking it.
  • Use caution during pregnancy.
  • Skip it if you leak urine or semen easily from a depleted Kidney picture, unless paired with herbs that hold in.
  • AHPA safety class 2d: specific use restrictions rather than a blanket warning.
  • The restrictions are the liquid requirement and the bowel-narrowing contraindication above.
  • The mucilage can slow how much of a medication your gut absorbs.
  • Take other medicines at least an hour before plantain seed, or several hours after.
  • One case report of plantain seed affecting lithium levels. On lithium, check with your prescriber first.

How to take it

Drink

Tie 9–15g of seeds in a muslin bag, then simmer with 3 cups water for 20–25 minutes. The bag matters: loose seeds turn the decoction gluey and slip through a strainer. Drink plenty of water alongside.

Simmer 9g in a cloth bag for a few days when your ankles are swollen after long flights or hot weather

Where it comes from

Plantain seed appears in the Shén Nóng Běn Cǎo Jīng. Its Chinese name literally reads 'before the cart seeds,' after the plant's habit of growing in cart tracks and roadside ruts. Two grades circulate, a larger and a smaller seed, and classical sources say there is no real difference in quality between them. Classically it is the herb that gives heat and excess fluid an exit route, which is why it turns up as an assistant in formulas built around draining rather than building.